Yes, still called Chordette Gem, still same price. I was contacted by the shop where I had just bought it and told of the upgrade and that they would swap it for a new one with APT-X. Credit to Unilett of New Malden for great customer service. Believe the other stock units are going back to Chord for the upgrade which I suspect is a software upgrade rather than hardware upgrade but don't know for sure.
The new Gem I received however has an APT-X logo on the bottom. I believe at one time Chord were going to charge more for the APT-X version, hence needed to be able to differentiate them. Then they made the decision just to include it on all models so don't know whether the logo will be on all future models.
I struggled to find out information about the protocols being used by Chord. The link in one of the posts above to the APT-X sites gives the most information. I Googled aptx to find it, but you do have to search this information out.
At one point I emailed Chord, who replied quickly, stating that I could get the Gem updated for under £20 pounds including return postage. So if you have a non APT-X one and want to upgrade you should contact Chord or I assume you could do it through the shop where you bought it. Having used both, the difference on bluetooth is very significant. This assumes, of course, the sending device supports APT-X as well and you are not using compressed files.
Judging by the quality I would say it is 16/44.1as APT-X state. I like its bluetooth rather that wifi. In my house at least its the only buetooth device used wheras there are 2 desktops and 3 laptops using wifi. So the Gem will get dedicated bandwith.